Indonesia Conference Directory

Corresponding Author
Puri Wijayanti

Institutions
(a) Program Studi Teknik Perminyakan, FTKE, Universitas Trisakti, Jakarta Barat 11440, Indonesia
*puri.wijayanti[at]trisakti.ac.id
(b) Program Studi Teknik Perminyakan, FTKE, Universitas Trisakti, Jakarta Barat 11440, Indonesia

Abstract
Quantitative analysis of reservoir properties in a well is determined by transient pressure analysis. Transient pressure according to its type consists of Pressure Build up and Pressure Draw Down. this analysis provides an overview of the characteristics of a reservoir. This analysis includes the process of determining drainage area, shape, heterogeneity, porosity, average pressure, skin, permeability, and distance from a reservoir to boundary or flow discontinuities. This test is to determine the ability of gas production in the PW-02 Well, carried out by using the Modified Isochronal test method. This test aims to determine the productivity of a potential (Absolute Open flow). Transient pressure test on PW-02 Well using the Pressure Build up Test (Type Curve Pressure Derivative) method, it is found that the well model is Vertical well and the reservoir model is Two porosity PSS. While the boundary model obtained is Rectangle. Then, the data obtained in the form of positive skin is 1.46, the permeability is 62.5 mD and the reservoir pressure is 2529.32 psia. Based on the analysis obtained Absolute Open Flow Potential (AOFP) of 117406 mscf/D. While the deliverability test value obtained is 117413 mscf/D with a n value of 0.825.

Keywords
AOFP, Pressure Build Up Test, Modified Isochronal Test, Well Testing, Derivative Pressure

Topic
Material Engineering

Link: https://ifory.id/abstract/r4PjpuFNwM9U

Corresponding Author
Mujiarto Mujiarto

Institutions
a) Postgraduate Students, Department of Mechanical Engineering, Institut Sains dan Teknologi Nasional, Jl.Moh Kahfi II Srengseng Sawah Jagakarsa, Jakarta Selatan 1264, Indonesia
*wilarso09[at]gmail.com
b) Department of Mechanical Engineering, Institut Sains dan Teknologi Nasional, Jl.Moh Kahfi II Srengseng Sawah Jagakarsa, Jakarta Selatan 1264, Indonesia
c) Department of Mechanical Engineering, Universitas Muhammadiyah Tasikmalaya, Jl. Tamansari Km. 2,5, Mulyasari, Tamansari, Tasikmalaya 46196, Indonesia
*mujiarto[at]umtas.ac.id

Abstract
Diesel Engine in Ampenan PLTD which is operated by PT. X has damaged the injector spring in cylinder

Keywords
Diesel engine; Exhaust manifold; Glowing; Injector spring; Maintenance management

Topic
Material Engineering

Link: https://ifory.id/abstract/38jX4fA7DBFw

Corresponding Author
Budi Lukman Hakim

Institutions
Sekolah Tinggi Teknologi Garut

Abstract
Jacket pile is a corrosion protection system that is applied to ASTM 252 steel piles in the tidal and splash zone area of the Jetty. In this system the vessel is leaning on the breasting dolphin (BD). There has been damage to 9 new pile jackets installed and operated for several days in February 2018 on BD. damage occurs in the front position of the pneumatic fender direction of the vessel leaning. analysis is carried out using observation, inspection and simulation methods. the results of the analysis of the causes of damage to the jacket pile is due to vertical collisions and loads from the pneumatic fender. the visual simulation it can be predicted that when the ship rests near BD, the backrest will be held by a pneumatic fender, so that the floating fender will pound and press the pile jacket with mashing energy of 13.88 t.m, both in a shock, swing perpendicular and vertical to the pile BD. To prevent the recurrence of similar cases, it is recommended to use a BD Guard to protect the pile and jacket pile of BD from direct collisions and friction from pneumatic fenders and barges.

Keywords
Breasting Dolphin, Corrosion Protection, Failure Analysis, Jacket Pile, Jetty

Topic
Material Engineering

Link: https://ifory.id/abstract/cdwAKjpu26xZ

Corresponding Author
RINI SETIATI

Institutions
Petroleum Engineering Departement, Faculty Of Earth Technology And Energy, Trisakti University, Jakarta

Abstract
Oil and gas industry is an industry with a high cost and high risk, artificial intelligence will help the work of humans to minimize the risk of accidents, reduce processing time and improve corporate profits. So the work becomes more efficient.The aims of the study give information that the artificial intelligence help the work to evaluate the initial gas in place on reservoir. Reservoir RGN has long produced, then it needs to be evaluated to find out how many initial gas in place is left in the reservoir. Additional research is needed to know the type of reservoir and drive mechanism.The method used is the research on reservoir RGN, the data used are based on real data in field.This research uses artificial intelligence MBAL and PVTP software, with the study of literature.Based on the research results obtained, this type of reservoir RGN is dry gas reservoir, with the drive mechanism is depletion drive. Initial gas reservoir RGN is 50,661.3 MMscf, with estimate ultimate recovery is 47,966.13 MMscf, recovery factor was 94.68% and the remaining reserve reservoir RGN in July 2018 is 10,850.386 MMscf or 10,85 Bscf.Artificial intelligence helps work, provides diverse outputs and the results obtained are more accurate and detailed

Keywords
original gas in place, artificial intelligence, PVTP, MBAL

Topic
Material Engineering

Link: https://ifory.id/abstract/TpaCUd7uEjFM

Corresponding Author
RINI SETIATI

Institutions
Petroleum Engineering Departement , FTKE, Universitas Trisakti , Jakarta

Abstract
Pattern X is one of the patterns in Field Z which is 60 km west of Prabumulih, South Sumatra, where the full scale waterflood is implemented. In general, the pattern used is an irregular inverted 5-spot where there are six production wells namely Z-091, Z-098, Z-110, Z-157, Z-195, and Z-233 and one injection well namely Z-227. Waterflood is a secondary recovery method by injecting water into the reservoir. Waterflood surveillance analysis was carried out to determine the conditions around the production and injection wells during waterflood. Surveillance analysis is used as a measure of the success in waterflood activities. One of methods that used is the Hall Plot method. It is obtained a slope which moves upward where displacement is moved normally or stable. However, over time there is an increase in the slope of the tilt where skin changes occur. In fact, the slope that occurs due to the installation of Multilayer Packer is used to adjust the desired injection rate. In the end, the injection results have no problems and runs stable. Based on the results of the Waterflood Surveillance Analysis Using the Hall Plot method, it can be concluded that the injection in the Z-227 injection well runs normally or stably

Keywords
Hall Plot, irregular inverted 5-spot, Surveillance, Waterflood

Topic
Material Engineering

Link: https://ifory.id/abstract/nQTx9AdUXDEb

Corresponding Author
RINI SETIATI

Institutions
Petroleum Engineering Departement , FTKE, Universitas Trisakti , Jakarta

Abstract
The wells analyzed in this Final Project are the A-1 well, T field. Reservoir in this field is gas reservoir with sandstone rock formation, so one of the problems in Field T is the sand problem. Due to the sand problem on well A-1, well test analysis must be done first, to see if there is any damage to the formation if the flow rate is increased.Identification of formation damage in a well can be done by doing Pressure Buildup test. The method used is pressure build up test by Horner method which is done manually and Pressure Derivative with Saphire software v.3.20. The determination of deliverability test was conducted by conventional methods C and n. Given the results of the analysis, the permeability value remains, the value of the skin decreased, and Initial Pressure also decreased. From the results of the tests, there were no significant changes, indicating no formationdamage. The results of the deliverability tests in 2017 decreased, due to initial pressure decrease. Based on the results of well testing, there is no formation damage, so the flow rate can still be increased according to the IPR curve.

Keywords
Deliverability, Horner, IPR curve, Pressure Build up, Well testing

Topic
Material Engineering

Link: https://ifory.id/abstract/MfFW8rteGnuq

Corresponding Author
Ahmad Kholil

Institutions
Department of Mechanical Engineering Education, Engineering Faculty,
Universitas Negeri Jakarta, Kampus A Jl. Rawamangun Muka, Jakarta, 13220, Indonesia.
Email: ahmadkholil[at]unj.ac.id

Abstract
The study aims to determine the composite characteristics of wood powder, coconut fiber, and green mussel shells that will be used as material for electric motorcycle brake pads. Composites are made with three variations. The first sample (SK30K10CK10) consisted of 30% wood powder, 10% coconut fiber, 10% green clam shell and 50% polyester resin. The second sample (SK20K20CK10) consisted of 20% wood powder, 20% coconut fiber, 10% green clam shell and 50% polyester resin. And the third sample (SK10K30CK10) consists of 10% wood powder, 10% coconut fiber, 10% green clam shell and 50% polyester resin. All samples were tested for hardness and thermal testing. The test results are compared with commercial electric motorcycle brake materials. Based on the test results that the highest level of violence is owned by SK20K20CK10. The results of the specimen samples show that the highest decomposition point is the SK30K10CK10 specimen.

Keywords
composite, coconut fiber, wood powder, green clam shell

Topic
Material Engineering

Link: https://ifory.id/abstract/ftb2Yr8pXmWx

Corresponding Author
Budi Lukman Hakim

Institutions
Sekolah Tinggi Teknologi Garut

Abstract
The oxide and nano ceramic system of Mullite-Magnesia-Yttria Stabilized Zirconia were studied. Some fracture toughness models were examined to evaluate crack length parameter whether comply with Palmqvist and median crack criteria at c/a ratio equal to 3.0. The mullite crystal structure was observed using SEM and looks likely needle, whereas 3YSZ crystal appears smoother. Through EDS analysis, it detected the oxides in Mullite system i.e. Al2O3, and SiO2. With similar method, some oxides were observed in the Mullite-Magnesia-3YSZ system such as MgO, Al2O3, SiO2, Y2O3 and ZrO2. With XRD analysis, nano MMZ system shows containing Al6Si2O13, Corundum (Al2O3), Zirconia (ZrO2), and Quartz (SiO2). Fracture toughness KIC of the ceramic composite of nano mullite-magnesia-zirconia complies with Palmqvist and median crack criteria. Nano ceramic particle shows higher value of hardness and fracture toughness while compared with oxide ceramic system.

Keywords
Fracture Toughness, Mullite, Nano ceramic composite, Yttria Stabilized Zirconia

Topic
Material Engineering

Link: https://ifory.id/abstract/wM2ucgWkyNer

Corresponding Author
Ridwan Ridwan

Institutions
(1*)Departement of Chemical Engineering, Politeknik Negeri Lhokseumawe,
Jl. Banda Aceh-Medan Km.280,3, Buketrata, Lhokseumawe 24301
Phone/Fax : (0645)42670
(2)Departement of Mechanical Engineering, Politeknik Negeri Lhokseumawe,
Jl. Banda Aceh-Medan Km.280,3, Buketrata, Lhokseumawe 24301
*ridwan.kimia[at]pnl.ac.id

Abstract
Many food packages (plastic wrappers) today cannot be broken down by the environment. therefore, it is necessary to add natural substances that can make the food package decompose and be resistant to contamination with bacteria. Poly lactic acid (PLA) is one of the natural polymers produced by several bacteria that grow in crops rich in carbohydrates (such as sugar beets, corn and others). This research aims to insert ZnO nanoparticles and chitosan into a plastic layer of PLA (poly lactic acid) which can improve the antibacterial properties of the resulting packaging. The method used in making PLA-ZnO-chitosan Nano composite is the precipitation method and the heating method. PLA-ZnO Nano composites were obtained by varying ZnO nanoparticles 0.5% by weight, 2% by weight, and 3.5% by weight. The results obtained in SEM images show that nanoparticles are homogeneously distributed on the plastic surface. Antimicrobial tests show nanocomposites work effectively in deactivating E. coli and S. aureus. where it was found that E. coli was more susceptible to this type of nanocomposite, where there was a reduction of 3.4 logs to 3.5% ZnO loading in the PLA layer

Keywords
PLA, ZnO, food packaging, Nanocomposite, Antimicrobial

Topic
Material Engineering

Link: https://ifory.id/abstract/M42UxKRwuXca

Corresponding Author
RINI SETIATI

Institutions
Petroleum Engineering Departement , FTKE, Universitas Trisakti , Jakarta

Abstract
TJS reservoir is a gas reservoir located in the area of West Java. TJS reservoir has been producing since September 1999 until now, with a total production of 37115,774 MMscf. Based on the research, the TJS reservoir is dry gas reservoir reservoir with thrust in the form of a depletion drive. The purpose of calculating and evaluating of the ga initial in place of the TJS reservoir is to see the compatibility between empirical calculations and simulator calculations. This research method uses correlation data in the form of petrophysical data, PVT data, production history data and historical data on reservoir pressure. Determination of reservoir type is based on PVT data in the field using IPM PVTP software to analyze the type of reservoir. This software requires data on composition of natural gas composition, reservoir pressure and temperature. Determination of the Gas Initial In lace (GIIP) in the TJS reservoir using the material balance method based on analysis of pressure and production data, plots between P / Z to Gp. The results of the calculation of the initial TJS reservoir gas content using the material balance method obtained the initial gas content value of 50063.59 MMscf and based on the MBAL software analysis, the initial gas content value was 50661.3 MMscf. In this study, the determination of the amount of initial gas content (GIIP) in the TJS reservoir with the material balance method and analysis of the MBAL software has obtained the appropriate results.

Keywords
original gas in place, material balance, IPM MBAL, estimated ultimate recovery, remaining reserve

Topic
Material Engineering

Link: https://ifory.id/abstract/NnHj4L7vdxqB

Corresponding Author
Prantasi Harmi Tjahjanti

Institutions
1 Department of Mechanical Engineering, Universitas Muhammadiyah Sidoarjo,
Kampus 2 Jalan Raya Gelam nomer 250 Candi Sidoarjo, Jawa Timur, Indonesia
2 Department of Mechanical Engineering, State University of Surabaya, Indonesia


*E-mail: prantasi[at]gmail.com prantasiharmi[at]umsida.ac.id

Abstract
Koma material is one part of a wire cutting machine that is in PT. X in Indonesia, which functions as a wire straightening device that will be processed or cut. This material is made from cast iron and is obtained from imports. Never tried to make local product. The aim of the research was to make Koma material from cast iron. The method used is to make Koma material such as imported products and then do hardness testing and observe the microstructure using optical microscope. The results are compared with Koma imported products. The results show that the coma material of imported products has a higher hardness than local products, because there are differences in chemical elements in the cast iron.

Keywords
Koma material, import product, local product, hardness, microstructure

Topic
Material Engineering

Link: https://ifory.id/abstract/gyEc8TetF73R

Corresponding Author
Qolby Sabrina

Institutions
Research Centre for Physics, Indonesian Institute of Sciences
Kawasan Puspiptek Serpong Gd. 442 Tangerang Selatan, Banten 15314, Indonesia

Abstract
Solid polymer electrolyte (SPE) appropriate to solve packaging leakage and expansion volume in lithium-ion battery systems. Evaluation of electrochemical performance of SPE consisted of mixture lithium salt, solid plasticizer, and polymer precursor with different ratio. Impedance spectroscopy was used to investigate ionic conduction and dielectric response lithium bis(trifluoromethane)sulfony imide (LiTFSI) salt, and additive succinonitrile (SCN) plasticizer. The result showing enhanced high ionic conductivity. In half-cell configurations, wide electrochemical stability window of the SPE has been tested. Have stability window at room temperature, indicating great potential of SPE for application in lithium ion batteries. Additive SCN contribute to forming pores that make it easier for the li ion to move from the anode to the cathode and vice versa for better perform SPE. Pore of SPE has been charaterization with FE-SEM. Additive 5% w.t SCN shows the best ionic conductivity with 4.2 volt wide stability window and pretty much invisible pores.

Keywords
Solid polymer electrolyte, ionic conductivity, succinonitrile, electrochemical, lithium-ion battery

Topic
Material Engineering

Link: https://ifory.id/abstract/BervZ4WnbLhz

Corresponding Author
Martin Fatah

Institutions
(1) STT PLN, Jakarta, Indonesia,
(2) Wood Group Kenny, Jakarta, Indonesia
(3) Wood Group Kenny, Perth, Australia

Abstract
A pipeline in the seabed was successfully commissioned and had commenced production from the well. The pipeline has life time design for 20 years. However, a leakage from the flange connection was detected a couple months after start of production. The pipeline was isolated by closing the valves on the line tee, and shutdown the well production. This condition remains for 6 months before any remedial action taken. During that period, it is believed that there is any corrosion mechanism occurred which could reduce the pipeline integrity. The paper briefly described the corrosion threats and assessed the corrosion rate of the leakage pipeline with limited information of factors that affecting corrosion rate. Additionally, recommendations for preparation of the pipeline to minimize internal risks are given.

Keywords
pipeline, seabed, leakage, corrosion threats, corrosion mechanism

Topic
Material Engineering

Link: https://ifory.id/abstract/Bcm7AYEaVMpH

Corresponding Author
Puri Wijayanti

Institutions
Program Studi Teknik Perminyakan, FTKE, Universitas Trisakti, Jakarta Barat 11440, Indonesia

Abstract
In order to improve and increase oil recovery by EOR CO2 injection, CO2 MMP is an important key parameter whereas the CO2 injection must be conducted at or above MMP. The aim of this study is to determined CO2 MMP by using one-dimensional CMG simulation model and proposed the CO2MMP correlations. on L reservoir. To be able to make an accurate simulation model and to choose the best correlation , it is necessary to validation by comparing the obtained CO2 MMP with experiments in the laboratory on 8 type oil from various field. The result showed that Zhang-s correlation is the best correlation which have -6.9% average percentage of errors while using the CMG simulation model shows the average percentage errors approximately -6.5 %. Using Zhang-s correlation we calculated that CO2 MMP on L reservoir about 3388 psia and from CMG simulation we have obtained CO2 MMP equal as 3428 psia.

Keywords
Correlation, Simulation, Minimum Miscible Pressure (MMP), Enhanced Oil Recovery (EOR)

Topic
Material Engineering

Link: https://ifory.id/abstract/GpUVzK8YwFWE

Corresponding Author
IMAM BASORI

Institutions
Department of Mechanical Engineering, Faculty of Engineering, Universitas Negeri Jakarta, Jl. Rawamangun Muka, Jakarta 13220, Indonesia
*unimam_r_one[at]yahoo.com

Abstract
Steel has a very important role in the industrial application, especially for the manufacture of automotive components such as gears. In its application, gear undergoes the compressive and friction loads, so that in the manufacturing process, materials with high hardness and wear resistance are needed. One method to increase steel hardness is by quenching process. In this research, quenching process will be carried out on AISI 1045 steel using the salt water as the cooling media. The austenization process was conducted at a temperature of 850 ° C with the holding time of 15 and 30 minutes. The samples were then salt quenched with the salt concentration of 0, 10 and 23%. The results showed that the salt quenching process on AISI 1045 steel tended to change the combination of ferrite and pearlite phases to be martensite. This process also increases the hardness of AISI 1045 steel, in which the highest hardness value is found in the sample with 30 minutes austenization process and salt concentration of 23%. In contrast, this sample have also the lowest impact resistance value of 0.056 J / mm2.

Keywords
salt quenching; austenization; ferrit; pearlite; martensite

Topic
Material Engineering

Link: https://ifory.id/abstract/zBKR6ZbyfQDV

Corresponding Author
Gerry Resmi Liyana

Institutions
a) Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia
*gerryliyana[at]gmail.com
b) Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Kampus UI Depok, Depok 16424, Indonesia
*ahyuwono[at]gmail.com

Abstract
ZnO nanostructures have been attracting much interest of researchers due to their unique properties and wide potential for various applications. In this study, the effect of seeding temperature and growing time on the characteristics of ZnO nanorods were investigated. The seed solutions were first prepared at temperature of 0, 30, and 60℃ for 1 hour using zinc nitrate tetrahydrate and hexamethylenetetramine as precursors. The ZnO seed layers were then deposited onto ITO glass substrates by spin coating technique prior to the chemical bath deposition (CBD) growth at temperature of 90℃ for different times (3, 4, and 5 hours). The synthesized ZnO nanorods were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and UV–Vis spectrophotometry. The results showed that with the increase in seeding temperature from 0℃ to 60℃, the crystallite size decreased from 71.32 to 38.95 nm, while the band gap energy increased from 3.27 to 3.55 eV, respectively. While with increased of growing time during CBD, the crystallite size was adversely increased from 65.37 to 88.09 nm, and consequently the band gap energy was found to decrease from 3,55 to 3,52 eV.

Keywords
ZnO nanorods, ITO, chemical bath deposition, seeding temperature, growing time

Topic
Material Engineering

Link: https://ifory.id/abstract/nXJPv7agMWAc

Corresponding Author
Sherly Novia Sari

Institutions
Research Center of Physics, Indonesian Institute of Indonesia

Abstract
Low cost and very simple activation method (KOH as activating agent) is used for the synthesis of activated carbon derived from the biomass manihot esculenta crantz (mocaf). The mocaf derived activated carbon as electrode material in supercapacitor and characterized by SEM for to analyse the morphology, Brunauer-Emmet-Teller to know the surface area and to measure the electrochemical performance characterized by Cyclic voltammetry, Galvanostatic charge-discharge and Electrochemical impendance spectroscopy. Electrochemical studies indicate that the mocaf delivers the maximum specific capacitance of (36 F/g) at scan rate (5 mV/s) in aqueous electrolyte (1 M LiPF6) for (2.0 V) operating voltage. The electrodes from mocaf exhibits good rate capability with an excellent charging/ discharging cycle stability in aqueous electrolyte (1 M LiPF6) during 10.000 cycles. The results indicate that mocaf shows good electrochemical properties to be used for energy storage application.

Keywords
mocaf, supercapacitor, energy storage, biomass, low cost

Topic
Material Engineering

Link: https://ifory.id/abstract/rFmLqDuVR3Qc

Corresponding Author
Nurul Fatia Jannah

Institutions
a) Student of Defense Industry Study Program, Faculty of Defense Technology, Indonesia Defense University
*nurul.jannah[at]tp.idu.ac.id
b) Teacher of Defense Industry Study Program, Faculty of Defense Technology, Indonesia Defense University

Abstract
ENGINEERING COMPOSITE MATERIALS AS RADAR WAVE ABSORBERS - The latest technological developments make a fighter aircraft capable of entering enemy territory without being detected thanks to material engineering carried out with a combination of two or more materials with different characters in each constituent component to obtain a new element with characteristics as desired. This research was conducted using the analytic hierarchy process (AHP) method that compares the character of materials to be used on stealth aircraft. Data is obtained through literature studies, and secondary data use. The composite material was chosen as the material used in stealth fighter aircraft, as the anti-radar fighter aircraft, considering the nature of its properties which makes the aircraft structure stronger and lighter and meets the STWR standard (strength to weight ratio) as a comparison between strength and mass the material itself.

Keywords
Material Engineering, Composite, Radar Absorber, AHP

Topic
Material Engineering

Link: https://ifory.id/abstract/y7P62EHwXFMC

Corresponding Author
RINI SETIATI

Institutions
Petroleum Engineering, Faculty of Earh Technology and Energy, UniversitasTrisakti, Jakarta

Abstract
In drilling operation there are two important matters that must be considered, which are the pumps and drillingfluid rheologythat are influencing hydraulics drilling system.The major function of drilling fluid is to lift the drill cutting to the surface and still maintain the drilling hole to avoid an encounter.Evaluation of hydraulics drilling for bottom hole cleaningwill count theparameter successwhich influence in removal of cutting to the surface for bottom hole cleaning and optimization drilling calculation hydraulics. The velocity of drilling fluid in annular, the flow that is formed and the ability of bottom hole cleaning are highly influenced by specifications of mud pump as a resource power for mud to flowthat also will determine how the value of flow rate can be circulated.Mud rheology,PV, YP and MWwill influence the performance of mud to carry cutting on drilling operation. The success of the bottom hole cleaning of drilling wells evaluated based on the calculation of hydraulics drilling at every depth and inclination changes while also review the parameters of Cutting Transport Ratio (Ft), Cutting Concentration (Ca), Cutting Carrying Index (CCI), Particle Bed Index (PBI) andoptimizatio of hydraulics drilling system. Q optimum is very influential on the value of bit hydraulic horse power (BHHP) and surface horse power (HPS) that provide more optimized power to pump the mud withminimize the effect of pressure loss.

Keywords
Bit hydraulic horse power, Surface Horse Power, Pressure Loss, Cutting Removal

Topic
Material Engineering

Link: https://ifory.id/abstract/FvGbxTKHaXCZ

Corresponding Author
Syukur Daulay

Institutions
Departemen Teknik Metalurgi dan Material, Fakultas Teknik, Universitas Indonesia
*syukur.daulay71[at]ui.ac.id

Abstract
One of the easy and cheap solar cell is Dye sensitized solar cell (DSSC) that use dye to harvest sun-s energy. It has drawback in low efficiency because of electron recombination occurrence and low transparence of photoanode. Reduced graphene oxide as derivative of graphene was hoped to overcome the problems. This research is aimed to study the effect of nanocomposite Titanium Oxide-reduced Graphene Oxide (TiO2-rGO) as photoanode to the efficiency by varying the percentage of rGO that fabricated by Hummer-s Method. The rGO from Graphite is successfully fabricated that confirmed from FTIR and SEM and TiO2-rGO nanocomposite has been fabricated and characterized using UV-Vis. The nanocomposite has been used as photoanode that affect the efficiency. The result shows the effect of percentage of rGO on the performance. The efficiency of solar cell is measured using solar cell simulator and give result for 0% rGO resulted 1.45 % efficiency and 0.664% that for 1% rGO. The moderate result is 2% of rGO that resulted 0.9 % efficiency. The pattern is not regular but the effects is counted

Keywords
DSSC, Nanocomposite, rGO, efficeincy

Topic
Material Engineering

Link: https://ifory.id/abstract/UWpdzvJc8wFR

Corresponding Author
Endang Noerhartati

Institutions
a) Department Agroindustrial Technology- Engineering Faculty, Universitas Wijaya Kusuma Surabaya, Indonesia
Jl. Dukuh Kupang XXV/54 Surabaya, Indonesia
*endang.noerhartati[at]gmail.com+endang_noer[at]uwks.ac.id
a) Postgraduate Student, Department of Education Management, Universitas Negeri Surabaya, Indonesia
Jl Kampus Ketintang, Surabaya, Indonesia
endang.18006[at]mhs.unesa.ac.id
b) Department of Medical, Medical Faculty, Universitas Wijaya Kusuma Surabaya, Indonesia
Jl. Dukuh Kupang XXV/54 Surabaya, Indonesia
yuhyi_h[at]yahoo.com+dortasimamora[at]gmail.com
c) Department Agroindustrial Technology-Engineering Faculty, Universitas Wijaya Kusuma
Surabaya, Indonesia
Jl. Dukuh Kupang XXV/54 Surabaya, Indonesia
titian354[at]gmail.com

Abstract
The purpose of the reseach was to analyze the activity of various glycemic indexes of sorghum rice products. The method used is experimental design, with variables of sorghum "nasi", sorghum "bubur", and sorghum "lontong" from red sorghum (Sorghum bicolor) and white sorghum (KD4) varieties. Observations included the glycemic index (GI) and glycemic load (GL), data analysis using the Anova Test followed by the 5% LSD Test. The results showed that the GI and GL significantly for all variable rice products and varieties sorghum; in the highest red sorghum is "Nasi" GI (34,37), GL (3,44); "lontong" GI (33,75), GL (3,37); and the lowest in "Bubur" GI (31,25), GL (3,12); while the highest white sorghum is "Nasi" GI (46,12), GL (4,61); "lontong" GI (35,37), GL (3,1); the lowest in "bubur" GI (23,87), GL (2,38); and the finding is show that the overall glycemic index of sorghum products is classified as low GI (GI <50), so it can be said that sorghum is a food source that can be used as an alternative healthy food.

Keywords
Glycemic index; Glycemic load; Sorghum rice products; Alternative healthy food

Topic
Material Engineering

Link: https://ifory.id/abstract/RTXbPGKW8tCq

Corresponding Author
Bentang Arief Budiman

Institutions
1Faculty of Mechanical and Aerospace Engineering, Institut Teknologi Bandung, Ganesha street no. 10, Bandung 40132, Indonesia
2National Center for Sustainable Transportation Technology, Indonesia

Abstract
Graphite is a fascinating material to study in nanotechnology. Surface profile and roughness of the graphite are some of the most important parameters to determine many physical and mechanical behaviors including friction or bonding condition. To acquire certain surface profile, mechanical polishing treatment is one of the easiest ways that can be applied. In this work, graphite is polished by three different grades of sandpapers (P800, P400, and P220) and cellulose-based paper. The surface properties are observed by a laser microscope and various surface roughness parameters were quantified. The sequential polishing process employed in this work is able to reduce the surface roughness and might improve the physical properties. This work sheds light on the importance of the mechanical surface treatment on graphite.

Keywords
Graphite, surface profile, surface roughness, mechanical treatment, polishing

Topic
Material Engineering

Link: https://ifory.id/abstract/Jx8VQUMn2fZh

Corresponding Author
RINI SETIATI

Institutions
Geology Engineering Departement , FTKE, Universitas Trisakti , Jakarta

Abstract
Indonesia has a high geothermal energy resource, preserved in many geothermal fields. But not all fields are potential for indirect utilizations such as for electric power generation. A direct utilization of low potential of geothermal energy resource has been performed at Batukuwung geothermal field, Serang, West Java. A simple design of vegetable grain dryer has been created (constructed) using galvanis metal pipes. A reduction of temperature from 63 degrees Celcius at the heat source to 41 degrees Celcius at the dryer tool through galvanis metal pipes is quite enough for vegetable grain drying purposes. It is quite a prospect simple technology to be applied and developed in Indonesia as a geothermal energy country having various vegetable grain products from various plants such as coffee, corn, peanut and many other tropical plantations.

Keywords
Low potential geothermal resource, heat conversion, grain dryer

Topic
Material Engineering

Link: https://ifory.id/abstract/MAGjft7Q8Pmq

Corresponding Author
Eris Rifaldi

Institutions
a) Departemen Pendidikan Teknik Elektro, Universitas Pendidikan Indonesia,
Jl. Dr. Setiabudi 229, Bandung 40154, Indonesia
*eris111213[at]student.upi.edu
b) Pusat Penelitian Elektronika Dan Lembaga Telekomunikasi Ilmu Pengetahuan Indonesia, Lembaga Ilmu Pengetahuan Indonesia,
Jl. Sangkuriang, Bandung 40135, Indonesia
c) Departemen Pendidikan Fisika, Universitas Pendidikan Indonesia,
Jl. Dr. Setiabudi 229, Bandung 40154, Indonesia
d) Departemen Pendidikan Kimia, Universitas Pendidikan Indonesia,
Jl. Dr. Setiabudi 229, Bandung 40154, Indonesia

Abstract
This research aims to produce an IoT-based Fiber Optical Chemical Sensor (FOCS) sensor system for pH detection using an ESP-32 microcontroller. The chemical sensor developed uses an optical fiber medium with a light transceiver technique. By utilizing the properties of light on optical fibers and by using SFP XXXX transceivers a voltage change data is obtained which is then sent and processed by the ESP-32 microcontroller so that it can be displayed on a screen and will be displayed on a smartphone in the form of measured pH prices. The tool made can be implemented for various groups, especially farmers with additional features.

Keywords
ESP 32; SFP; Fibre Optic; pH

Topic
Material Engineering

Link: https://ifory.id/abstract/v6jLJ8kxYh2B

Corresponding Author
Suryani Suryani

Institutions
1Departement of Chemical Engineering, Politeknik Negeri Lhokseumawe, 24301, Aceh-Indonesia
*suryanisalim[at]yahoo.com

Abstract
Cinnamon essential oil (CEO) is a natural antimicrobial being investigated for food packaging as a substitute for synthetic chemicals due to consumer concerns over food safety. In this study, lactic acid poly (PLA) and chitosan were successfully modified with essential oil (CEO) at concentrations (1.5%, 2%, 2.5%, and 3% v / v) that formed composite fibres with using a simple electrospinning method. The morphology of the composite fibres can be seen from PLA / CS-CEO-2.5 showing good stability of the CEO so that the antimicrobial activity is increased compared to other blends. PLA / CS-CEO fibre shows a high level of long-term inactivation against Escherichia coli and Staphylococcus aureus due to the CEOs ongoing release, indicating that advanced PLA / CS-CEO fibres have great potential for active food packaging applications

Keywords
CEO, PLA, chitosan, packaging

Topic
Material Engineering

Link: https://ifory.id/abstract/uMyadGLHKv3h

Corresponding Author
Mila Karmila

Institutions
PRODI PENDIDIKAN TATA BUSANA DPKK FPTK UPI

Abstract
Fiber is a raw material used in the textile industry, based on the origin of the material there is fiber that comes from nature there is also derived from artificial fibers (synthetic). The needs of natural fibers such as cotton, hemp, flax, and other natural fibers still do not meet the needs of Indonesian textiles because these materials are goods that must be imported. Therefore, it is necessary to have a strategic effort in utilizing environmentally friendly alternative natural materials in Indonesia, one of which is lemongrass plants. Cereals (Cymbopogon nardus (L.) Rendle), physically have fiber. Currently the use of cereals is still limited to use for medicinal plants. Fragrant lemongrass can be effective as a medicine for headache, cough, stomach pain, diarrhea, body warmers, fever and mosquito repellent (Fauzi, 2009). Previous research by Rita and Ningtyas (2008) showed that ethanol extracts of leaf and stem of citronella can be used as plant-based pesticides to control Aedes aegypti mosquitoes and contain saponins, tannins, quinones and steroids. Basuki (2011) has also conducted research that the ethyl acetate extract of the citronella plant has been shown to have antibacterial activity against Escherichia coli and Staphylococcus aureus and it is also known that the ethyl acetate extract of the citronella plant contains flavonoids, polyphenols, saponins and essential oils. Based on various research results about the benefits and various benefits of cereals, awareness emerged to further research on the use of cereals as natural fiber material that can be processed into alternative textile materials, especially textile materials for home interior materials (apholstry) by raising the value of local wisdom and resources nature that has not been optimally processed. The potential of cereals has not been well assessed in Indonesia or the world. Through this research, it is expected that further developments will be made regarding the processing of textiles from lemongrass as an alternative fiber based on smart textiles.

Keywords
lemongrass, apholstry, smart textile

Topic
Material Engineering

Link: https://ifory.id/abstract/DzA9PbWpLxfE

Corresponding Author
Yusmaniar Yusmaniar

Institutions
a)Departement of Chemistry Faculty of Match and Science Universitas Negeri Jakarta, Jln Rawamangun Muka, Jakarta Timur 13220, Indonesia
b) National High Jakarta School
Jln. Raya Pos pengumben no.41 Jakarta 11630, Indonesia

*Email : yusmaniar[at]unj.ac.id 

Abstract
Anticipating the global trends of biodegradable plastic and its application to packaging industries, this study was conducted to prepare a seaweed ( Eucheuma cottonii ) based biodegradable plastic blended with polysaccharides derived from various tropical fruit seeds which are abundantly available in Indonesia such as avocado, jack fruits and durian. The objective is to prepare an environmentally friendly and edible bioplastic. The various polysaccharides was obtained through extraction and the bioplastic blends were heated at 80oC for 30 minutes.  The characterization conducted include mechanical properties, thermal and biodegradability analysis, spectral and surface analysis through Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscope (SEM) respectively.

Keywords
Bioplastic; Edible; Polysaccharides; Seaweed (Eucheuma cottonii)

Topic
Material Engineering

Link: https://ifory.id/abstract/tKem3Trwj6VP

Corresponding Author
RINI SETIATI

Institutions
Petroleum Engineering Faculty Of Earth Technology Trisakti University

Abstract
In this field, which has used this waterflooding technique as it goes through, there is a solid production which causes sand problems. Sand problems that occur result in increased production loss and cost lost. The purpose of this research is to find the right solution in overcoming sand problem, by studying the characteristics of the rock. Laboratory experiments were carried out using a mechanical method approach which was then used to determine the appropriate gravelpack design. The steps taken include testing the strength of the core of the three zones, The decrease of strength can conclude that the core of the three zones has begun to weaken. The results of the analysis of the grain size of the D50 then used to determine the appropriate gravelpack design in each zone. Zone A, using gravelpack 60/80, zone B using gravelpack 16/20, and zone C using gravelpack 30/50. From the gravelpack design obtained then a sand retention test is performed to determine the gravelpacks performance. With the results of the sand retention test showing good gravelpack performance for each zone, where the permeability value is good and the solid produced is not too much.

Keywords
sand problem, gravelpack, sand retention test

Topic
Material Engineering

Link: https://ifory.id/abstract/M6JXFrZuWje9

Corresponding Author
Teuku Rihayat

Institutions
(1)Departement of Chemical Engineering, Politeknik Negeri Lhokseumaw 24301 Aceh, Indonesia
*teukurihayat[at]yahoo.com

Abstract
Research on the manufacture of polyurethane with chitosan and bentonite fillers modified with CTAB into montmorillonite (MMT) which will be applied to medical devices. The raw polyurethane from castor oil and diisocyanate is in the form of Toluene Diisocyanate (TDI). The addition of chitosan to castor oil polyurethane functions as an anti-bacterial agent. Pure polyurethane still has a deficiency of high temperatures and therefore added MMT which functions as a heat-retaining agent. The bacteria used are E. coli bacteria and Staphylococcus Aureus bacteria. The results showed a polyurethane that can withstand high temperatures is PU-MMT-CS 6%. The best anti-bacterial properties were obtained in polyurethane containing chitosan with higher concentrations (PU-MMT-CS 6%).

Keywords
Polyurethane, Bentonite, Chitosan, MMT, Polyol, Castor Oil, Heat Resistance, Anti- Bacterial

Topic
Material Engineering

Link: https://ifory.id/abstract/GjwqndWakf87

Corresponding Author
Sri Ramayanti

Institutions
Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia
*sri.ramayanti71[at]ui.ac.id

Abstract
Zinc Oxide (ZnO) has attracted much attraction for its potential applications in ultraviolet region including sensors, solar energy, laser technology, optoelectronics and transparent conducting oxide. In this work, the influence of growth time and concentration of Hexamethylenetetramine (C6H12N4 / HMTA) on the formation of ZnO nanorods using Chemical Bath Deposition were investigated. ZnO nanorods (ZNRs) were synthesized on the FTO glass through a chemical bath deposition (CBD) using zinc nitrate tetrahydrate powder (Zn(NO3)2.4H2O) and HMTA with molar ratio 1:1, 1:2 and 1:4 at 90°C. The growth duration was varied at 120, 150 and 180 minutes at annealing temperature of 90oC. The synthesized ZnO was characterized using a scanning mission electron microscope (SEM), X-ray diffraction (XRD), and ultraviolet-visible spectroscopies (UV-Vis). Growth duration and concentration of HMTA were found to influence the morphology, orientation, and diameter of the ZNRs. X-ray diffractograms demonstrated strong and sharp peak at (002) plane as an indication of c-axis ZNRs. Secondary electron images showed that ZNRs were well aligned along the c-axis and the diameter of nanorods is increasing with the increased of growth time and concentration of HMTA. The optical properties of ZNRs showed that the absorbance increase at high growth time and concentration of HMTA.

Keywords
ZnO; Nanorod; Growth time; HTMA

Topic
Material Engineering

Link: https://ifory.id/abstract/acChfbzxXQuR